The Collaborative International Dictionary
Sea fan
Sea fan \Sea" fan"\ (s[=e]" f[a^]n`). (Zo["o]l.) Any gorgonian which branches in a fanlike form, especially Gorgonia flabellum of Florida and the West Indies.
Wiktionary
sea fan
n. Any gorgonian which branches in a fan-like form, especially (taxlink Gorgonia flabellum species noshow=1) of Florida and the West Indies.
WordNet
sea fan
n. corals having a treelike or fan-shaped horny skeleton
Usage examples of "sea fan".
He progressed along the line of sea fans, watching for the telltale piles of shells, which marked octopi dwellings.